Operating Instructions · 11.1 Postal address 40 11.2 Service 40 11.3 Spare parts 40 11.4 Accessories 41 11.4.1 Abrasives used, etc. 41 12. Appendix 43 12.1 EC Declaration of Conformity

Incl. USK 160 S floor-mounted version

Status 11.2019 Version 2.1 | Translation

Operating Instructions

Universal Wet-Grinding Machine

USK 160 S

2

Operating Instructions

3

Universal Wet-Grinding Machine USK 160 S

Manufacturer

KNECHT Maschinenbau GmbHWitschwender Straße 2688368 BergatreuteGermany

Phone +49 -7527-928-0Fax +49 -7527-928-32

[email protected]

Documents for the machine operator

Operating instructions

Date of issue of the operating instructions

November 14, 2019

Copyright

The copyright for these operating instructions and documents is held by KNECHT Maschinenbau GmbH. These documents will be delivered only to our customers and to operators of our products and are a part of the machine.

These documents may neither be reproduced, nor made accessible to third parties, including rival firms, without our express permission.

4

1. Important notes 7

1.1 Preface to the operating instructions 71.2 Warnings and symbols in the operating instructions 71.3 Warning signs and what they mean 81.3.1 Warning and prohibition signs on / in the grinding machine 81.3.2 General mandatory signs 81.4 Rating plate and serial number 91.5 Figure and item numbers in the operating instructions 9

2. Safety 10

2.1 Basic safety instructions 102.1.1 Observe notes in the operating instructions 102.1.2 Obligation on the part of the operator 102.1.3 Obligation on the part of the personnel 102.1.4 Hazards involved in handling the grinding machine 102.1.5 Malfunction 112.2 Intended use 112.3 Warranty and liability 112.4 Safety regulations 122.4.1 Organizational measures 122.4.2 Protective equipment 122.4.3 Informal safety measures 122.4.4 Selection and qualification of personnel 122.4.5 Machine control system 132.4.6 Safety measures in normal operation 132.4.7 Hazards due to electrical power sources 132.4.8 Particular hazard zones 132.4.9 Servicing (maintenance, repair) and fault elimination 132.4.10 Structural modifications to the grinding machine 142.4.11 Cleaning the machine 142.4.12 Oils and greases 142.4.13 Relocation of the grinding machine 14

3. Description 15

3.1 Intended use 153.2 Technical specifications 153.2.1 General 153.2.2 USK 160 S (tabletop version) 163.2.3 USK 160 S (floor-mounted version) 173.3 Functional description 183.4 Description of modules 193.4.1 Control panel 203.4.2 HV 161 belt grinding attachment (optional, all versions) 21

Table of contents

5

4. Transport 22

4.1 Transport aids 224.2 Transport damage 224.3 Transport to another installation site 22

5. Installation 23

5.1 Selection of qualified personnel 235.2 Installation site 235.3 Supply connections 235.4 Settings 235.5 Using the grinding machine for the first time 24

6. Commissioning 25

7. Operation 26

7.1 General principles of grinding technology 267.2 Switching on the grinding machine 277.3 Grinding sickle-shaped cutter knives on the wet-grinding belt 277.4 Grinding hand knives on the wet-grinding belt 287.5 Polishing and deburring with the polishing disc 297.6 Deburring the wet-honing wheel 307.7 Grinding cutlery knives on the serration grinding wheel 317.8 Changing the wet-grinding belt 337.9 Belt regulation 347.10 Coolant unit 357.10.1 Belt cooling 357.10.2 Closing the water nozzle for dry grinding 36

8. Care and maintenance 37

8.1 Cleaning 378.2 Lubrication schedule and lubricant table 37

9. Malfunctions 38

9.1 Faults 38

Table of contents

6

10. Disassembly and disposal 39

10.1 Disassembly 3910.2 Disposal 39

11. Service, spare parts and accessories 40

11.1 Postal address 4011.2 Service 4011.3 Spare parts 4011.4 Accessories 4111.4.1 Abrasives used, etc. 41

12. Appendix 43

12.1 EC Declaration of Conformity 43

Table of contents

7

1.1 Preface to the operating instructions These operating instructions are designed to make it easier for users to familiarize themselves with the universal wet-grinding machine, also referred to in the following as “the grinding machine” and use it for its intended purpose. The operating instructions contain important information on how to operate the grinding ma-chine safely, properly and cost-effectively. Observance of these instructions helps avoid hazards, reduce repair costs and downtimes, and increase the reliability and service life of the grinding machine. The operating instructions must always be accessible at the place of use of the grinding machine. The operating instructions must be read and used by all persons entrusted with working on the grinding machine, e.g. those entrusted with: • Transport, installation, commissioning • Operation, including troubleshooting in the process flow, as well as • Upkeep (maintenance, repair). In addition to the operating instructions and the binding accident prevention regulations applica-ble in the country and place in which the machine is used, generally acknowledged technological rules with regard to safe and professional work practices are to be observed.

1.2 Warnings and symbols in the operating instructions It is essential to observe the following symbols / designations used in the operating instructions.

The hazard triangle with the signal word “CAUTION” is used as a work safety indication for all work which might result in death or physical injury. Special care and caution must be taken when carrying out such work.

ATTENTION”ATTENTION” is used to draw attention to particular points in order to avoid damage and / or destruction of the grinding machine and its environ-ment.

NOTICE ”NOTICE” refers to user tips and especially useful information.

1. Important notes

CAUTION

8

1.3 Warning signs and what they mean

1.3.1 Warning and prohibition signs on / in the grinding machine

The following warning and prohibition signs have been affixed to the grinding machine:

CAUTION! DANGEROUS ELECTRICAL VOLTAGE (warning notice on the rear panel)

When connected to the voltage supply (3x 400 V), the grinding machine becomes electrically live and touching its live parts directly can be life-threatening.

Live machine parts may be opened only by authorized, trained personnel.

The grinding machine must be disconnected from the mains supply before carrying out servicing, maintenance and repair work on it.

CAUTION! RISK OF INJURY FROM ABRASIVE PARTICLES (mandatory sign on the front plate)

Grinding, polishing and dressing gives rise to abrasive particles which can enter the eyes.

Wearing safety glasses is mandatory when carrying out such jobs.

1.3.2 General mandatory signs

The following general mandatory signs must be observed:

CAUTION! RISK OF INJURY FROM KNIFE

Work on the grinding machine involves grinding knives which could cause serious cut injuries due to the sharp blades.

Wearing protective gloves is mandatory when carrying out such jobs.

Be careful when transporting blades! Use the protective devices provided by the knife manufacturer. Wear protective gloves and apron.

1. Important notes

Figure 7-9 Grinding notches

1

2

9

1.4 Rating plate and serial number

The rating plate is located on the rear panel of the machine.

The machine serial number can be found on the rating plate and on the rear left side wall (see arrow).

1.5 Figure and item numbers in the operating instructions

If the text refers to a machine component shown in a figure, a figure or item number is added in brackets after the machine component.

Example: (7-9/1) denotes figure number 7-9, item 1.

Hold the cutlery knife (7-9/1) to the serration grinding wheel (7-9/2) at a steep angle (approx. 45°).

Then slowly rotate towards the knife tip.

1. Important notes

Figure 1-1 Rating plate

Figure 1-2 Serial number

10

2.1 Basic safety instructions

2.1.1 Observe notes in the operating instructions

The basic prerequisite for safe handling and trouble-free operation of this grinding machine is familiarity with the basic safety instructions and regulations.

• These operating instructions contain important notes on how to operate the grinding machine safely.

• These operating instructions, in particular the safety notes, must be read by all those who work at the grinding machine.

• In addition, the rules and regulations regarding accident prevention at the place of use are to be observed.

2.1.2 Obligation on the part of the operator

The operator is obliged to allow only those persons to work on the grinding machine, who

• are familiar with the occupational safety and accident prevention regulations and have been received instruction in handling the grinding machine,

• have read and understood the operating instructions, in particular the section entitled “Safety” and the warning notes, and have provided signed confirmation of this.

Checks are also carried out at regular intervals to ensure that the personnel are fulfilling their obligation to observe safety at work.

2.1.3 Obligation on the part of the personnel

All personnel working on the grinding machine undertake to

• observe basic occupational safety and accident prevention regulations,

• read the operating instructions, particularly the section entitled “Safety” and the warning notes, and provide signed confirmation of this.

2.1.4 Hazards involved in handling the grinding machine

The grinding machine has been built to the latest technological standards and the established rules of technical safety. In spite of this, its use poses inherent risks which could result in bodily harm or even death of the user or third parties, or impairment of the grinding machine or other property.

The grinding machine may only be used:

• for its intended purpose,

• in faultless condition with regard to safety-related aspects.

2. Safety

11

Faults that might impair safety must be eliminated immediately.

2.1.5 Malfunction

If any safety-relevant malfunction occurs in the grinding machine or if the processing response indicates that such malfunction may have occurred, the grinding machine must be stopped imme-diately until such time as the malfunction has been detected and eliminated.

Malfunctions may only be eliminated by authorized specialists.

2.2 Intended use

The grinding machine is meant for grinding and polishing linear and sickle-shaped flat knives only.

Other than hand knives (e.g. carving knives), all the knives must be clamped to suitable grinding plates.

Before starting work on a flat knife, a check must first be carried out as to whether the knife fits onto the grinding plate. Only then may the knife be clamped onto the grinding plate.

Any other use is considered improper use. KNECHT Maschinenbau GmbH assumes no liability for damages resulting from improper use. The user alone bears the risk in such cases.

Use as intended includes the observance of all the instructions in the operating instructions.

The grinding machine is being used improperly if, for example:

• flat knives are ground without using the grinding plate.

• attachments are not properly mounted.

• knives are sharpened / polished in opposite direction of the cutting edge on the wet-grinding belt, finned grinding wheel, wet-honing wheel, serration grinding wheel as well as the polishing disc.

2.3 Warranty and liability

Warranty and liability claims in case of personal injuries or property damage are excluded if such damage is attributable to one or more of the following causes:

• improper use of the grinding machine

• improper transportation, commissioning, operation and maintenance of the grinding machine

• operating the grinding machine with defective safety devices, or using improperly attached or malfunctioning safety and protective equipment

• failure to observe the instructions with regard to transportation, commissioning, operation, maintenance and repair of the grinding machine

2. Safety

12

• unauthorized structural alterations to the grinding machine

• unauthorized modification of such aspects as drive conditions (power and speed)

• insufficient monitoring of machine parts that are exposed to wear

• use of unapproved replacement and wear parts

Use only original replacement and wear parts. If parts are purchased from external suppliers, there is no guarantee that they are designed and manufactured to withstand the required level of stress and provide the required level of safety.

2.4 Safety regulations

2.4.1 Organizational measures

All available safety devices must be checked regularly.

Observe prescribed intervals for recurring maintenance work or as specified in the operating instructions.

2.4.2 Protective equipment

Before commissioning the grinding machine, care must be taken to ensure that all protective equipment is properly mounted and functional.

Protective equipment may be removed only after the machine has stopped and has been secured against accidental restarting of the grinding machine.

When spare parts are supplied, the protective equipment must be attached by the operator as stipulated.

2.4.3 Informal safety measures

The operating instructions must be permanently available at the place of use of the grinding machine. In addition to the operating instructions, the generally applicable as well as the locally relevant accident prevention regulations must also be made available and observed.

All safety alert symbols and danger warnings on the grinding machine must be complete and clearly legible.

2.4.4 Selection and qualification of personnel

Only trained and instructed personnel may work on the grinding machine. The minimum legal age for employment must be observed.

2. Safety

13

The responsibilities of the personnel must be clearly assigned, i.e. commissioning, operation, maintenance and repair, etc.

Personnel still undergoing training or instruction may only work on the grinding machine under the permanent supervision of an experienced person!

2.4.5 Machine control system

Only trained and instructed personnel are allowed to switch on the machine.

2.4.6 Safety measures in normal operation

Refrain from any method of working which may pose a risk to safety. Only operate the grinding machine if all the safety devices are installed and fully functional.

Check the grinding machine for external signs of damage and correct operation of the safety devices at least once every shift.

Report any changes (including operating behavior) immediately to the department / person in charge. Where required, shut down the grinding machine immediately and secure against restart-ing.

Before switching on the grinding machine, ensure that no one is exposed to any risk from the start-up of the machine.

If there are any functional faults, stop the machine immediately and secure against restarting. Have the faults eliminated immediately.

2.4.7 Hazards due to electrical power sources

Work on electrical units or operating materials may only be performed by a qualified electrician in accordance with electrical rules.

Defects, such as damaged cables, cable connections, etc. must immediately be rectified by an authorized electrician.

2.4.8 Particular hazard zones

In the area of the wet-grinding belt, finned grinding wheel, serration grinding wheel, polishing disc and wet-honing wheel, there is a risk that clothing, fingers, and hair, for example, may be pulled in and crushed. Suitable personal protective equipment must be worn.

2.4.9 Servicing (maintenance, repair) and fault elimination

Maintenance work is to be carried out on schedule by trained personnel. Inform operating per-sonnel before starting repair work. A responsible supervisor must be appointed.

2. Safety

14

For all service work, the grinding machine is to be disconnected from the power supply and se-cured against accidental restarting. Pull out the mains plug. Cordon off the servicing area as far as possible.

After completion of the maintenance work and fault rectification, install all the safety devices and check whether they are fully functional.

2.4.10 Structural modifications to the grinding machine

Modifications, retrofitting or rebuilds of the grinding machine are not allowed without the per-mission of the manufacturer. This also applies to the installation and adjustment of safety devices.

No alterations may be carried out without the prior written approval of KNECHT Maschinenbau GmbH.

Immediately replace machine parts which are not in perfect condition.

Only use original replacement and wear parts. If parts are purchased from external suppliers, there is no guarantee that they are designed and manufactured to withstand the required level of stress and provide the required level of safety.

2.4.11 Cleaning the machine

Cleaning agents and materials used must be handled properly and disposed of in an environ-ment-friendly manner.

Ensure that wear and replacement parts are disposed of in a safe and environmentally friendly way.

2.4.12 Oils and greases

When handling lubricants / oils and greases, follow the safety regulations for the product. Observe special instructions for the foodstuffs sector.

2.4.13 Relocation of the grinding machine

Even when moving the machine a short distance from its site, disconnect it from all external pow-er supply sources. Before restarting the machine, connect it properly to the current supply.

When loading or unloading, only use hoisting and load lifting equipment with sufficient load-bearing capacity. Appoint a qualified banksman (signaler) for the lifting process.

No persons other than those entrusted with this work may be present in the loading and installa-tion area.

Only lift the grinding machine correctly with hoisting gear in accordance with the operating instructions (attachment points for hoisting equipment, etc.). Only use suitable transport vehicles with sufficient load-bearing capacity. Attach the load securely. Use suitable attachment points. When putting in operation again, proceed only as instructed in the operating instructions.

2. Safety

15

3. Description

3.1 Intended use

Using the USK 160 S universal wet-grinding machine, you can grind, deburr and polish hand and cutter knives as well as profile cutlery knives.

3.2 Technical specifications

3.2.1 General

Power supply* �� 3x 400 V

Mains frequency* �� 50 Hz

Output* �� 0.7 kW

Power consumption* �� 0.8 kW

Energy consumption* �� 2 A

Back-up fuse �� 16 A

Idle noise level of the wet-grinding belt �� 80 dB (A)

Diameter polishing disc �� 150 mm

Operating noise level of the polishing disc �� 84 dB (A)

Diameter serration grinding wheel �� 150 mm

Operating noise level of the serration grinding wheel �� 86 dB (A)

Speed �� 1750 1 / min

*) This information may change depending on the electrical power supply.

A DELTA cutter knife from KNECHT Maschinenbau GmbH was ground.

16

3. Description

3.2.2 USK 160 S (tabletop version)

Height �� 450 mm

Width �� 610 mm

Depth �� 550 mm

Weight �� 29 kg

450

mm

550 mm610 mm

Figure 3-1 Dimensions in mm (tabletop version)

CoG CoG

17

3.2.3 USK 160 S (floor-mounted version)

Height �� 1200 mm

Width �� 630 mm

Depth �� 610 mm

Weight �� approx. 66 kg

610 mm630 mm

1200

mm

Figure 3-2 Dimensions in mm (floor-mounted version)

3. Description

CoG CoG

18

3.3 Functional description

The machine is equipped with a wet-grinding belt, a finned grinding wheel and a wet-honing wheel. The USK 160 S can be alternately equipped with a serration grinding wheel for cutlery knives and a polishing disc.

In just a few simple steps, you can mount a device (HV 161) that sharpens cutter knives up to 200 ltr. at the correct angle (accessory).

The USK 160 S is available in a tabletop and floor-mounted version.

3. Description

19

3. Description

3.4 Description of modules

1 Finned grinding wheel2 Protection hood left3 Wet-honing wheel4 Water tray5 Machine feet6 Protection hood right7 Wet-grinding belt

Figure 3-3 General view of grinding machine (USK 160 S floor-mounted version | HV 161)

8 HV 161 belt grinding attachment (optional)

9 Base with compartment for accessories (floor-mounted version only)

6

7

8

9

1

2

3

4

5

20

3. Description

Figure 3-4 Side view (left) of grinding machine (USK 160 S tabletop version)

1 Spray guard2 Slide guard3 Water nozzles left4 “Protection hood” star handles

3.4.1 Control panel

1 “I / 0” main switch

1

2

4

3

4

13

Figure 3-5 Control panel

1

21

3. Description

3.4.2 HV 161 belt grinding attachment (optional, all versions)

1 Grinding lever2 Grinding plate 3 Hand wheel for feeding the belt grinding

attachment4 Spacer disc bracket

Figure 3-6 HV 161 belt grinding attachment

1

2

34

22

4. Transport

For transporting the machine, the locally applicable safety and accident prevention regulations must be observed.

Only transport the machine in the upright position (with the machine feet facing downwards).CAUTION

4.1 Transport aids

For transporting and for setting up the grinding machine, only use adequately dimensioned means of transport aids, e.g. truck, forklift or hydraulic lifting truck.

When using a forklift or a lift truck, move the fork under the grinding machine.

Bear in mind the center of gravity of the machine. The center of gravity (CoG) is shown in figure 3-1 and 3-2.

4.2 Transport damage

If damage is detected on unloading after acceptance of the delivery, inform KNECHT Maschinen-bau GmbH and the freight forwarder immediately. If required, consult an independent expert immediately.

Remove the packaging and shipping straps. Remove the shipping straps on the grinding machine. Dispose of the packaging in an environment-friendly way.

4.3 Transport to another installation site

For transport to another installation site, ensure that space requirements are fulfilled (see Chapter 3.2).

A reliable electrical connection must be provided at the new installation site.The grinding machine must be stable and firmly placed.

Installations on the electrical system may only be performed by an authorized specialist. Observe the locally applicable safety and accident prevention regulations.

CAUTION

23

5.1 Selection of qualified personnel

We recommend having the grinding machine installed by trained KNECHT personnel.

We assume no liability for damage caused by improper installation.CAUTION

5.2 Installation site

When determining the installation site, bear in mind the space required for installation, mainte-nance and repair work on the grinding machine (see Chapter 3.2).

5.3 Supply connections

The grinding machine is delivered ready for connection with the appropriate connection cable.

Make sure the machine is correctly connected to the power supply.

CAUTION

5.4 Settings

The various components and the electrical system are adjusted by KNECHT Maschinenbau GmbH prior to delivery.

ATTENTIONUnauthorized changes to set values are not permitted and may damage the grinding machine.

5. Installation

24

5.5 Using the grinding machine for the first time

Place the grinding machine at the installation site on a level table or base.

Compensate for any unevenness in the floor using the adjustable machine feet by unscrewing them counterclockwise. The machine is aligned using a level (floor-mounted version only).

Have a qualified electrician on site install the current supply.

Completely install and check the safety devices before commissioning.

Be sure to have all the safety devices checked by trained personnel before commissioning.

CAUTION

5. Installation

25

All work on the machine may only be performed by trained personnel.

The locally applicable safety and accident prevention regulations must be observed.

There is a risk that hands, hair, and clothing may be pulled in while the grinding machine is switched on.

This can result in serious injury. Personal protective equipment must be worn.

CAUTION

Fill water tank (6-1/1) with approx. 9 liters of water.

Connect the power plug (CEE plug) to the power socket provided on site (3x 400 V, 16 A).

Set the main switch (6-2/1) to “I”. The wet-grind-ing belt, polishing disc / wet-honing wheel and finned grinding wheel / serration grinding wheel rotate.

Check the direction of rotation. The direction arrow (6-2/2) indicates the rotation direction the wet-grinding belt and polishing disc / wet-honing wheel and finned grinding wheel / serration grind-ing wheel.

If the rotation directions are incorrect, have the phase reversed by a qualified electrician.

The feed quantity of coolant is regulated by turn-ing the water nozzle (6-1/2).

After verifying the correct rotation direction, turn the main switch (6-2/1) to the “0” position.

Figure 6-2

Figure 6-1

6. Commissioning

1

2

2

1

26

7.1 General principles of grinding technology

If a blade has become blunt, material must be removed from its surface to restore it to its original sharpness.

For that, the knife in question is ground to produce its cutting edge. If, in the process, a burr appears on the blade, then the grinding process was successful and can be concluded. Now, be-fore the final sharpness is achieved, the burr must be removed in a further step. This is done with a polishing disc.

As it is not only the sharp cutting edges but also the long service lives that define a blade, the cutting angle is another important indicator of a blade’s performance. The smaller the cutting edge angle, the higher is the theoretical service life. In practice, however, the cutting edge breaks off and is therefore no longer sharp when the cutting edge angle is too small.

The cutting edge angles must therefore lie between 15° and 35°. If the cutting edge angles are less than 15°, the blade becomes so unstable that it breaks at the slightest resistance. If the cutting edge angle is greater than 35°, the blade is extremely stable, but service life will not be as long.

One more criterion for judging the properties of a cutting edge is the cutting edge profile.

There are three different ground profiles:

Tapered grinding Concave grindingConvex grinding

Convex ground profiles can mostly be found on cutter blades and hand knives. Tapered and concave ground profiles are predominantly found on circular knives and blades.

In general: Adhering to the profiles and the cutting edge angles specified by the manufacturer is required

7. Operation

27

7.2 Switching on the grinding machine

Set the main switch (3-5/1) from “0” to “I”.

The wet-grinding belt, polishing disc / wet-honing wheel and finned grinding wheel / serration grinding wheel rotate.

7.3 Grinding sickle-shaped cutter knives on the wet-grinding belt

To grind sickle-shaped cutter knives, install the optional HV 161 (7-1/1) belt grinding attachment on the machine; the grinding plate (7-1/2) with knife is mounted to this device.

NOTICE More information on this can be found in the technical documentation of the HV 161 belt grinding attachment.

7. Operation

Figure 7-1 HV 161 belt grinding attachment

1

2

28

7.4 Grinding hand knives on the wet-grinding belt


Never hold the cutting edge against the rotation direction of the wet-grinding belt. This can result in serious injuries.CAUTION

Lay the hand knife flat onto the wet-grinding belt.

The cutting edge should run an angle to the grinding belt, not perpendicular. Press the knife onto the grinding belt with your free hand. The stronger the pressure, the more convex the grind will be.

Pull both sides of the hand knife over the grind-ing belt alternately until a burr is created over the entire cutting edge length.

Then, deburr and polish the hand knife on the polishing disc as described in Chapter 7.5 and on the wet-honing wheel as described in Chapter 7.6.

Switch off the grinding machine after the grinding process is finished. To do so, turn the “I / 0” main switch (3-5/1) to the “0” position.

Figure 7-2 Grinding hand knives

7. Operation

29

7.5 Polishing and deburring with the polishing disc


Never hold the cutting edge against the rotation direction of the polishing disc.

Polishing gives rise to grinding particles that could enter the eyes. Wear safety glasses. Wear a face mask.

This can result in serious injuries.

CAUTION

The burr on the knife is removed with the polish-ing disc; this gives the knife its final sharpness.

Set the main switch “I / 0” (3-5/1) to “I”.

Hold the polishing paste (7-3/1) briefly against the polishing disc (7-3/2).

For polishing / deburring, move the knife (7-4/1) at a steep angle (approx. 20 - 25°) along the polish-ing disc (7-4/2). Alternately polish the upper and lower side of the knife until the burr is removed.

Switch off the grinding machine after the polish-ing process is finished. To do so, switch the “I / 0” main switch (3-5/1) to the “0” position.

7. Operation

Figure 7-3 Applying the polishing paste

12

Figure 7-4 Polishing hand knives

2

1

30

7.6 Deburring the wet-honing wheel


Never hold the cutting edge against the rotation direction of the wet-honing wheel.



CAUTION

Knives can also be deburred on the water-cooled wet-honing wheel.

The exact circumferential speed and optimal hard-ness of the wet-honing wheel result in a smooth blade that remains sharp for a long time.


When deburring, move the knife (7-5/1) at a flat angle (approx. 15°) and apply strong pressure along the wet-honing wheel (7-5/2).

As soon as the burr is removed, continue grinding at a slightly steeper angle (approx. 17°) and with-out applying pressure.

Switch off the grinding machine after the deburr-ing process is finished. To do so, switch the “I / 0” main switch (3-5/1) to the “0” position.

7. Operation

Figure 7-5 Deburring hand knives

1

2

31

7.7 Grinding cutlery knives on the serration grinding wheel


Never hold the cutting edge against the rotation direction of the serra-tion grinding wheel.



CAUTION

The serration grinding wheel is mounted to grind cutlery knives, and the polishing disc is mounted to for dry polishing.

To do so, loosen the star handles (7-6/1) on the left side of the machine and remove the protec-tion hood. Then dismount the finned grinding wheel and the wet-honing wheel.

Use a spanner wrench (SW 22) (7-7/1) to loosen the nuts (7-7/2) of the grinding spindle.

Loosen = turn left (in the direction of rotation) Tighten = turn right (against the direction of rotation)

The serration grinding wheel and polishing disc are installed in reverse order.


NOTICE If the grinding spindle turns with this, then counter it with a spanner wrench (SW 10) on the end of the shaft.

7. Operation

Figure 7-6 Removing the protection hood

Figure 7-7 Loosening the finned grinding wheel

1

2

1

1

32

In order to grind off the old serrated edge, first pregrind the cutlery knife (7-8/1) on a fine grind-ing belt (240 grain).

Hold the cutlery knife (7-9/1) to the serration grinding wheel (7-9/2) at a steep angle (approx. 45°).

Then slowly rotate towards the knife tip.

Then, deburr and polish the cutlery knife (7-10/1) on the polishing disc (7-10/2) as described in Chapter 7.5 or on the wet-honing wheel as de-scribed in Chapter 7.6.

ATTENTIONThe water nozzle must be closed for dry polishing (see Chapter 7.10.2)

Switch off the grinding machine after the grind-ing process is finished. To do so, switch the “I / 0” main switch (3-5/1) to the “0” position.

7. Operation

Figure 7-8 Pregrinding cutlery knives

Figure 7-10 Polishing cutlery knives

1

Figure 7-9 Grinding notches

1

2

1

2

33

7.8 Changing the wet-grinding belt

For all work on the grinding machine, the locally applicable safety and accident prevention regulations as well as instructions in the “Safety” and “Important Notes” section of the operating instructions must be observed.

Never switch on the machine without the belt protection hood attached. Risk of injury!

CAUTION

Loosen and remove the star handles (7-11/1) by turning them in counter-clockwise direction; re-move the belt protection hood (7-11/2).

Turn the belt relief lever (7-12/1) in the direction of the arrow up to limit stop.

Remove the used grinding belt and place a new belt over the contact disc and guide pulley. Turn the belt relief lever (7-12/1) against the direction of the arrow up to limit stop. Turn the grinding belt by hand and check to see if it is not grinding anywhere.

Reattach the belt protection hood.

ATTENTIONNote the running direction arrows on the inside of the grinding belt.

7. Operation

Figure 7-11 Removing the belt protection hood

Figure 7-12 Changing the grinding belt

1

1

2

1

34

7.9 Belt regulation

If the grinding belt is not running in the center of the contact disc, it can be aligned with the belt adjuster (7-13/1).

Turning the belt adjuster (7-13/1) counter-clock-wise makes the grinding belt run to the left.

Turning the belt adjuster (7-13/1) clockwise makes the grinding belt run to the right.

7. Operation

Figure 7-13 Belt adjustment

1

35

7.10 Coolant unit

In the USK 160 S, the coolant is supplied through continuous circulation around the grinding wheel using a submersible pump (7-14/1).

The abrasives are not immersed in water while the machine is idle. The grinding sludge is collected in the water tray.

The submersible pump is driven by the motor via a circular belt.

7.10.1 Belt cooling

The submersible pump feeds the coolant through the water nozzle to the wet-grinding belt.

Coolant is apportioned by the swiveling of the water nozzle.

In doing so, the flow rate of the coolant does not change, rather the impact angle on the grinding belt.

The pin (7-15/1) on the water nozzle (7-15/2) indi-cates the angle at which the coolant will hit.

The standard setting is perpendicularly down-wards.

Turning clockwise = more coolant Turning counterclockwise = less coolant

For cleaning, the water nozzle is simply pulled out after removing the protection hood.

NOTICE Opposed to the belt side, for which as much coolant should be applied to the wet-grind-ing belt, the finned grinding wheel or serra-tion grinding wheel must receive more subtle doses.

7. Operation

Figure 7-14 Submersible pump

Figure 7-15 Adjusting the water nozzle

1

2 1

36

7.10.2 Closing the water nozzle for dry grinding

When using a polishing disc to polish, the feed of water must be stopped.

To do so, push the rubber cap (7-16/2) over the hole (7-16/3) on the water nozzle (7-16/1).

7. Operation

Figure 7-16 Closing the water nozzle

2

3

1

37

For all work on the grinding machine, the locally applicable safety and accident prevention regulations as well as instructions in the “Safety” and “Important Notes” section of the operating instructions must be observed.

CAUTION

8.1 Cleaning

Clean the machine after each sharpening in order to prevent the grinding sludge from drying and making it harder to remove.

After cleaning the machine, lightly grease the hand knife grinding machine with non-corrosive oil (also refer to lubrication schedule). The coolant must be replaced on a weekly basis.

8.2 Lubrication schedule and lubricant table

Lubrication work

Turnus OEST SHELL EXXON Mobil

DEA

Lubricating the threads of star handles and clamping levers

4 weeks Multi-purpose grease L 2

Gadus S2 V100 2

Mobilith SHC 100

Dolon E2

Lubricate machine parts after cleaning

After each grinding

ParaffinumPerliquidum 16 L

Shell Risella 917

Marcol 82 Merkur pharmaceuticalwhite oil 40

8. Care and maintenance

38

9.1 Faults

Malfunction Fault Remedy

Wet-grinding belt stops under load

V-belt tension too weak Tighten V-belt

V-belt wheel and v-belt worn

Replace

Wet-grinding belt moves vio-lently backwards and forwards or cannot be adjusted

Wet-grinding belt faulty Replace wet-grinding belt

Contact disc is damaged or worn out

Change the contact disc

Guide pulley is worn out Change the guide pulley

No coolant flow Too little coolant in the water tray

Refill

Lines are blocked Clean

Pump defective Replace pump

Machine cannot be switched on

Power plug defective or not correctly inserted

Inspect power plug

If a fault is not included in the faults table or if the fault is not eliminated, please contact our service staff (Chapter 11).

9. Malfunctions

39

10. Disassembly and disposal

10.1 Disassembly

All operating materials must be disposed of correctly.

Secure moving parts against slipping.

The disassembly must be carried out by a qualified specialist company.

10.2 Disposal

At the end of service life, the machine must be disposed of by a qualified specialist company. In exceptional cases and by agreement with KNECHT Maschinenbau GmbH, the machine can be returned.

Operating materials (e.g. grinding disks, wet-grinding belts, polishing discs, etc.) must also be disposed of correctly.

40

11.1 Postal address

KNECHT Maschinenbau GmbHWitschwender Straße 2688368 BergatreuteGermany

Phone +49 -7527-928-0Fax +49 -7527-928-32

[email protected]

11.2 Service

Service management:See postal address

[email protected]

11.3 Spare parts

If you need spare parts, please use the spare parts list provided with the machine. Please place your order as shown below.

Please always include the following information: (Example)

Machine type (USK160S)Machine number (12530953160S)Assembly designation (base plate, USK160S)Designation of individual part (pump, USK160S)Item no. (9)Drawing no. (013E-01-0000)Quantity (1 pcs.)

Please feel free to contact us if you have any questions.

11. Service, spare parts and accessories

41


11.4 Accessories

11.4.1 Abrasives used, etc.

Name Dimension Grain Order number Note

Wet-grinding belt 960x50 40 412A-20-0521

960x50 60 412A-21-0516

960x50 80 412A-22-0517

960x50 100 412A-23-0518

960x50 120 412A-24-0519 installed on delivery

960x50 240 412A-26-0520

Wet-grinding belt, compact grain

960x50 180 412A-30-0180

960x50 320 412A-30-0320

Polishing disc d.150x40xd.15 412N-05-0150

Wet-honing wheel d.150x50xd.100 412K-01-0549 installed on delivery

Finned grinding wheel d.150x50xd.15 100 412H-02-0554

d.150x50xd.15 280 412H-03-0624 installed on delivery

Serration grinding wheel, pitch 1.0

d.150x65xd.15 412G-01-0256 water-resistant

Pitch 1.25 d.150x65xd.15 412G-01-0498 water-resistant










ATTENTIONDo not use any other abrasives without the approval of KNECHT Maschinenbau GmbH.

42

ATTENTIONThe company KNECHT Maschinenbau GmbH is not liable in the event that other abrasives are used.

If you require grinding disks, wet-grinding belts, polishing discs, polishing pastes or other accesso-ries, please contact our sales staff, partners, or KNECHT Maschinenbau GmbH directly.

Thank you for buying our product!


43

12. Appendix

12.1 EC Declaration of Conformity in accordance with the EC Directive 2006 / 42 / EC

• Machinery Directive 2006 / 42 / EC• Electromagnetic Compatibility Directive 2014 / 30 / EC

We hereby declare that the machine mentioned below fulfills the basic health and safety require-ments of the relevant EC Directive by virtue of the machine's construction and design and the version placed by us on the market.

This declaration becomes void if the machine is modified in any way without our consent.

Designation of the machine: Universal Wet-Grinding MachineType designation: USK 160 S

Applicable harmonized standards, DIN EN 12100-1in particular: DIN EN 12100-2 DIN EN 60204-1 ISO 13857 DIN EN 349

Responsible for documentation: Peter Heine (Dipl. Ing. Mechanical Engineering BA) Phone +49 -7527-928-15

Manufacturer: KNECHT Maschinenbau GmbH Witschwender Straße 26 88368 Bergatreute Germany

Complete technical documentation is available. The operating instructions document for the ma-chine is available in its original version and in the native language of the user.

Bergatreute, October 18, 20149 Managing Director––––––––––––––––––––––––––– –––––––––––––––––––––––––––––– –––––––––––––––––––––Place, date Signature Signatory details

KNECHT Maschinenbau GmbHWitschwender Straße 26 88368 Bergatreute Germany T + 49 -7527- 928-0 F + 49 -7527- [email protected] www.knecht.eu